Illuminating device

• US 7,695,151 B2
• Filed: 03/20/2008
• Issued: 04/13/2010
• Est. Priority Date: 03/20/2008
• Status: Active Grant

• Current Assignee: Prolight Opto Technology Corporation
• Original Assignee: Prolight Opto Technology Corporation
• Inventors: Tseng, Hsu-Keng, Chen, Chen-Lun Hsing, Hung, Jung-Hao
• Primary Examiner(s): Truong; Bao Q
• Application Number:
  US12/076,594
• Publication Number:
  US 20090237926A1
• Time in Patent Office: 754 Days
• Field of Search: 362/230, 362/231, 362/84, 362/555, 362/800, 257/79, 257/98, 257/100, 257/103
• US Class Current: 362/84
• CPC Class Codes: H01L 2224/45144 Gold (Au) as principal constituent
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 33/50 Wavelength conversion elements
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

The illuminating device of the invention comprises at least one lighting component, red lighting component, current limiting component and fluorescent body, wherein said red lighting component is first series connected with said current limiting component, and further parallel connected with said lighting component, so that input current to red lighting component is controlled by said current limiting component to be smaller than input current to lighting component, thereby said fluorescent body receiving and triggering the light emitted by said lighting component is mixed with the light emitted by said red lighting device to emit a white light with high lighting efficient and high color rendering white light.

Claims

1. An illuminating device comprises at least the following:

at least one lighting component;

at least one red lighting component has a center wavelength of 600˜

680 nm;

at least one current limiting component is series connected with said red lighting component, and said current limiting component and said red lighting component are parallel connected with said lighting component;

a fluorescent body is installed around said lighting component to receive and trigger the light emitted by said lighting component.

2. The illuminating device as claimed in claim 1, wherein said illuminating device is further installed with a substrate having a graphical circuit to install with said blue and red lighting components as well as current limiting component thereon, while said blue and red lighting components and said current limiting component are sealed and covered by said fluorescent body.

3. The illuminating device as claimed in claim 2, wherein said substrate can be a circuit board, a lead frame or a ceramic substrate.

4. The illuminating device as claimed in claim 2, wherein said substrate can be further embedded with at least one heat sink.

5. The illuminating device as claimed in claim 1, wherein said illuminating device is further installed with a casing having at least two separated frames at the inside thereof to extend outwardly outside of said casing from inside thereof.

6. The illuminating device as claimed in claim 5, wherein said blue and red lighting components as well as current limiting component are installed at one of said frames, wherein said frames are electrically connected, while blue and red lighting components and current limiting component are sealed and covered by fluorescent body.

7. The illuminating device as claimed in claim 1, wherein said current limiting component can be a resistor.

8. The illuminating device as claimed in claim 1, wherein said current limiting component can be IC electronic parts.

9. The illuminating device as claimed in claim 1, wherein said fluorescent body has yellow fluorescent powders at inside thereof.

10. The illuminating device as claimed in claim 1, wherein said lighting component has a center wavelength of 270˜

480 nm to emit the light ranging from UV to blue light.

11. The illuminating device as claimed in claim 1, wherein said lighting component center wavelength is 430˜

480 nm, and the emitted light thereof can be a blue light.

12. The illuminating device as claimed in claim 1, wherein said lighting component center wavelength is larger than 270 nm, and the emitted light thereof can be an UV light.

13. The illuminating device as claimed in claim 1, wherein said lighting component or said red lighting component can be a high power lighting component.